【導(dǎo)讀】Step1.Readingprehension.environment.correctorder.chart.thechart.minutes.limitedtime.finishthechart.(self-study).languagepoints.phrases:destroy,nature,soil,flood,friendly,difference.exercise.points.resultbygroups.languagepoints.points.andmembers).keypoints.here.group.wholeclass.points.dailylives?environment?discussion.group.environment.Readingprehension→Languagepoints→Discussion→Exercises